When clipping PDF, I frequently (but not always) get a message saying I have to reload the page before I can clip. Reloading never helps, I just keep getting the same message.
This is in Firefox. One such example page is (https://) onlinelibrary.wiley.com/doi/pdf/10.1111/j.1756-8765.2010.01108.x (put the parenthesized prefix on to get the whole URL -- I separated it because the forum interface kept putting the full page inline). That site does weird stuff with their PDFS, but even so Evernote clips it just fine in Chrome (I also tried Safari, but I can't even get the Web Clipper extension